#include<bits/stdc++.h>
#define int long long
using namespace std;
int cnt;
inline int read(){
    int x=0,f=1;char ch=getchar();
    while(ch<'0'||ch>'9'){
        if(ch=='-') f=-1;
        ch=getchar();
    }
    while(ch>='0'&&ch<='9'){
        x=(x<<1)+(x<<3)+(ch^48);
        ch=getchar();
    }
    return x*f;
}
inline void dfs(int k,int g){
    if(k==6){
        cnt++;
        return;
    }
    for(int i=g;i<=10;i++){
        dfs(k+1,i+1);
    }
}
signed main(){
    dfs(1,1);
    cout<<cnt;
    return 0;
}